<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <meta content="学学">
    <meta content="名称">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!--360用极速模式打开-->
    <meta name=renderer">
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    <title>楼梯式导航</title>
</head>

<body>
<div class="box">
    <div class="nav" style="background:yellow;">我</div>
    <div class="nav" style="background:blue;">是</div>
    <div class="nav" style="background:#dd95c3;">你</div>
    <div class="nav" style="background:#30ccdd;">爸</div>
    <div class="nav" style="background:#dd6f48;">爸</div>


</div>
<div class="dh">
    <ul>
        <li class="ti">wo</li>
        <li>是</li>
        <li>你</li>
        <li>吧</li>
        <li>吧</li>
    </ul>
</div>
</body>
</html>